We ran into this situation with hand loads from a Lee hand loader. It was before we got our press. The rounds were originally fired out of a different rifle. When we tried them after hand-loading with the Lee hand loader the case was STUCK. The hand loader apparently does not do a full length resize of the case. Only the neck.
I vote for polish/inspect the chamber and/or try a different mfg load.
I vote for polish/inspect the chamber and/or try a different mfg load.